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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1266470/tusb8020b-down-stream-port-cannot-be-detected-by-cpu
您好！
在我们的应用中、CPU 可以检测上行端口、但 无法检测到两个下行端口。
您是否有调试指南？ 谢谢！
CPU 是否可以同时支持主机和器件模式？ 对于下行端口、为了被集线器检测到、CPU 必须是一个器件。
谢谢
大卫
